[cfe-commits] [patch] Conditionalize use of 'long long' for libc++

[Dimitry Andric]

Hi,

When using libc++ headers on FreeBSD, in combination with -std=c++98,
-ansi or -std=c++03, the long long type is not supported.  So in this
case, several functions and types, like lldiv_t, strtoll(), are not
declared.

The attached patch conditionalizes those types and functions for libc++,
using a _LIBCPP_HAS_NO_LONG_LONG define.  This can easily be extended
to other operating systems.

-Dimitry
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